JPS58110387A - Suspension system for rear wheel for two-wheel barrow - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an improvement in a rear wheel suspension system for a two-wheeled vehicle.

In a two-wheeled vehicle, for example, a motorcycle, the rear wheel is suspended by a shock absorber, and vibrations of the rear wheel are effectively absorbed and alleviated by the shock absorber, thereby improving riding comfort. There is.

By the way, the above-mentioned shock absorber includes a shock absorber that exerts a damping effect by the flow resistance of fluid such as oil;
A unitized shock absorber equipped with a spring that stores external vibrations as elastic energy was used.

However, recently there has been a strong desire to reduce the weight of motorcycles, and this demand has also been directed toward this type of shock absorber.

The present inventor has devised the present invention in response to such demands, and the object thereof is to provide a rear wheel suspension system that connects a vehicle body and a rear wheel support member via a shock absorber. By including a ring-shaped elastic band stretched between the vehicle body frame and the rear wheel support member, weight reduction and
To provide a rear wheel suspension device for a two-wheeled vehicle that can improve riding comfort.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a side view of a motorcycle equipped with a rear wheel suspension system according to the present invention, Fig. 2 is a partially enlarged side view of the motorcycle showing the tensioned state of the elastic band, and Fig. 3 is a perspective view of the same. FIG. 4 is a perspective view of the elastic band.

In the motorcycle 1 shown in FIG. 1, reference numeral 2 denotes a body frame. An engine 3 is mounted on the body frame 2, and a keyer brake 4 and an air cleaner 5 are connected to the engine 3. A fuel tank 6 is provided above the engine 3, a seat 7 is provided behind the fuel tank 6, and side covers 8 are provided below both sides of the seat 7.

On the other hand, a hend pipe 9 is fixed to the upper front end of the body frame 2, and a top bridge 1 is attached to the head pipe 9.
A stem shaft that integrally connects the top bridge 10 and the bottom bridge 11 is rotatably inserted therethrough, and a handle 12 is fixed on the top bridge 10. In front of the head pipe 9 above (s.

The upper part of the front fork 13 is inserted and connected between the top bridge 10 and the bottom bridge 11, and a front wheel 14 is rotatably supported at the lower end of the front fork 13. Note that 15 is a front fender.

Also, a bracket 1 is attached to the body frame 2 at the lower center of the vehicle body.
The front end of a rear fork 17, which is a rear wheel support member, is pivotally mounted 18 via 6, and a rear wheel 19 is rotatably supported at the rear end of the rear fork 17. The distance between the vehicle body and the rear fork 17 is as shown in the diagram (shock 7
They are connected by a absorber 20. This shock absorber 20, for example, has a fluid sealed inside and generates a required damping force by the flow resistance when this fluid passes through a valve etc., and has only a damping force function. This shock absorber 20 is different from conventional shock absorbers which also have a spring function, and is therefore lighter than conventional shock absorbers.

On the other hand, a ring-shaped elastic band 21 is installed between the rear fork 17 and the vehicle body frame 2 as shown in the figure. That is, as shown in detail in FIGS. 2 and 3, on the upper front side of the rear fork 17, a bracket 22, 22 is provided upright, and a shaft 23 is installed between the two brackets 22, 22. On the other hand, the shaft 23 is located between the lower corner portions of the vehicle body frame 20.
The other shaft 24 is installed parallel to this, and the elastic band 21 is stretched between these shafts 23 and 24.

As shown in FIG. 4, the elastic band 21 is formed into a ring shape by continuously overlapping and bonding one elastic body formed into a band shape, and has sufficient elasticity and strength, and is lightweight. In addition, 25 in Figure 1 is a hariyahuenda.

The elastic band 21 bears the weight of the vehicle body and the occupant by its elastic force, and therefore, the elastic band 21 is always in a tensioned state.

By the way, even if the rear wheel 19 moves up and down due to unevenness of the road surface while driving, this vibration is alleviated by the buffering action of the elastic band 21, and is quickly absorbed and alleviated by the damping action of the shock 7 absorber 20. Shocks and vibrations from 19 are not directly propagated to the vehicle body (therefore, this suspension system can contribute to improving ride comfort and handling stability in the same way as conventional shock absorbers.

On the other hand, this device eliminates the metal springs used in conventional shock absorbers and uses a lighter elastic band 21, which makes it possible to significantly reduce the weight of the entire vehicle body, which is advantageous in terms of driving performance. Not only that, but the ride comfort can be further improved by reducing the unsprung load.

In the embodiments described above, the shock absorber is composed of a shock absorber and an elastic band, but depending on the case, the hysteresis characteristic of the elastic band can be used for the damping effect and the shock absorber can be omitted. In this case, the above-mentioned effect becomes even more pronounced.

As is clear from the above description, according to the present invention, in a rear wheel suspension system for a two-wheeled vehicle that connects a vehicle body and a rear wheel support member via a shock absorber, the shock absorber is disposed between the vehicle body frame and the rear wheel support member. Since the structure includes a stretched ring-shaped elastic band, it is possible to reduce the weight of the two-wheeled vehicle and improve riding comfort.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, and FIG. 1 is a side view of a motorcycle equipped with a rear wheel suspension system according to the present invention;
FIG. 2 is a partially enlarged side view of the motorcycle showing the tensioned state of the elastic band, FIG. 3 is a perspective view of the same, and FIG. 4 is a perspective view of the elastic band. In the drawing, 2 is the body frame, 17 is the rear fork, 19
20 is a rear wheel, 20 is a shock absorber, and 21 is an elastic band. Patent applicant Honda Motor Co., Ltd.

Claims (1)

[Claims] A rear wheel suspension system for a two-wheeled vehicle that connects a rear wheel support member whose front end is pivotally connected to the vehicle body and whose rear portion rotatably supports a rear wheel and the vehicle body via a shock absorber, A rear wheel suspension system for a two-wheeled vehicle, wherein the shock absorbing device includes a ring-shaped elastic band stretched between a vehicle body frame and the rear wheel support member.